Pneumatic tire.



UNITED STATES Patented November 15, 1904.

PATENT OFFICE.

PNEUMATIC TIRE.

SPECIFICATION forming part of Letters Patent No. 774,790, dated November15, 1904. Application led November 24, 1903. Serial No. 182,538. (Nomodel.)

To all whom t may concern,.-

Be it known that I, EDWARD HENRY SED- DON, a subject of the King ofGreat Britain, and a resident of Brooklands, in the county of Chesterand Kingdom of Great Britain, have invented new and useful Improvementsin Pneumatic Tires, of which the following is a specification.

This invention relates to improvements in pneumatic tires, particularlyin those for motor and other heavy vehicles, and has for its object theproduction of a simple, reliable, and easily-repaired tire.

The improvements in this tire over the one described in Patent No. 747,001, granted to me on December 15, 1903, consist in the elimination ofone of the elements of the combination claimed in the patent-namely, thehoop C of said patent-and also in the absence of the dovetail head g4.The hoop C has to be loosened and taken oi along with the tire and inputting the tire on has first to be inserted into its positionrelatively to the tire and pushed onto the felly along with it. The costof the hoop and inconvenience of having to take it oi and put it onagain are avoided in the present construction. The chief advantage,however, consists in the doing away with the dovetail head g4. The tirepresent can be more cheaply molded and can be vulcanized in a two-partiron mold or case, while for molding the tire shown in Patent No.747,001 a three-part mold with a loose ring in three parts is required.The hoop AC has to be inserted into the cavity molded on the tire whilein its unvulcanized and plastic state, which is, a very troublesomeoperation, and the soft tire has to be put with this hoop in it into themold. It has to be made in three parts in order to get it in easilyWithout disturbing the plastic rubber, and the parts have to be iiXed"by screws to the bottom part of the mold, which in its turn makes itnecessary for the hoops to be put on in an exact circumferentialposition to this bottom part. The whole operation is very troublesomeand the tire costs nearly twice as much for labor as the present tire.

The tire shown in Figure 2 has a hoop; but

this is a fixture on the felly and need never come off. The twovariations, Figs. l and 2, permit one and the same size of tire to beused on two slightly-different sizes of wheels.

The claims in Patent No 747,001 are quite specific, claiming the specialcombination of all the partsshown in said patent, and .do not cover thespecial combination claimed in this application, and for this reason theapplication for another patent has been made. The present claims arebrought to distinguish from the claims of the patent.

In a tire made in accordance with this invention no separate air chamberor tube is required, as the tire forms an air-tight tube when secured tothe felly of the wheel. The tire is formed with an annular joint near toor at one side of the base and is secured to the felly and sealed bymeans of side langes or cheeks, one of which is removable.

The drawings attached hereunto illustrate my invention in itsapplication to wheels having wooden fellies, Fig. l showing a section ofthe tire applied to a broad felly, and Fig. 2 la section of the tireapplied to a narrow fe y.

The felly 1, Fig. l, is formed with an annular groove at one corner, oneside, 2, of which groove is cylindrical and the other side, 3, conical,forming an acute angle with side 2, so that the edge @L at the peripheryof the i'elly Y overhangs the edge 5 at the inner periphery of thegroove. An annular metal flange 6 is detachably secured to the side ofthe felly in which the groove is formed, preferably by bolts 7, withnuts 8, which bolts pass through the felly. Vhen this flange is securedin the felly, there is left an annular space between the side 3 of thegroove and the said flange, forming with the same a dovetail groove C.Upon the other side ci' the fell y is fixed a similar flange 9,preferably by the same bolts 7 the heads of which are arranged upon thisside. This iiange 9 is not required to be detachable and may bepermanently secured to the felly in any suitable manner.

Both lianges 6 and 9 stand up above the peripheral face of the felly,which when made of Wood, as in the case illustrated, has a metal hoop 10shrunk thereon. The outer edges of the flanges converge outward and thetire sits between them upon the hoop 10.

In already-existing wheels, the fellies of which are too narrow to allowa groove to be turned out of them without weakening them too much, ahoop 11, Fig. Q, having one conical side 1Q, is fixed by screws 13 onthe hoop 10 of the felly, or a hoop having the combined section of thetwo hoops 1() and 11 may be shrunk upon the felly.

The tire 15 consists of an annular endless tube, preferably of the formin cross-section illustrated in the drawings, which is shown with athickened tread 16, a bottom 17, formed in one piece with the body,having a deep flange 18 approximately in the plane of the wheel, formed,preferably, of soft india-rubber and adapted to pass into the dovetailgroove C and lie against the inner side 3 thereof and not adapted tofill it when the tire sits in the position indicated in the drawings.The opposite side 13 of' the tire is formed with a dovetail bead or rim14, adapted to lie in the said groove, and when pressed against theflange 18 to make an air-tight joint. The flange 18 and the beaded rim'I4 together in thickness slightly exceed the lateral depth of thegroove C in order to allow for compression of the material of the tire,which is built up of india-rubber and canvas in the well-known way, andpreferably faced with soft india-rubber on the inner side of the rim 14.

The metal flange 6 is applied after the tire is pushed upon the fellyagainst the metal flange 9, and when bolted tightly to the felly pressesthe flange 18 and the beaded rim 14 close together, thereby securing'that side of the tire to the felly and making' an air-tight joint. Theother side of the tire may be secured to the metal flange 9 by means ofthe bolts 21 only or by means of an annular ringclamp 2O in one piece orin segments having bolts passing through it and through the side of thetire and flange 9. Instead thereof the tire may simply have aninextensible wire or wires inserted into the wall of the tire near tothe felly and flange 9, or the tire may be formed with annularprojections 22 and the flanges 9 and 6 with recesses adapted to containthem, a wire Q3 being preferably inserted into them. The valve 24 may bepassed through the felly 1, but preferably is passed through the metalflange 6, as shown.

I claim as my invention 1. A pneumatic tire provided with aninflating-valve, adapted to flt a felly having an annular groove in oneside at the corner and having annular flanges projecting above thefelly, one of which flanges partly covers the said groove and isdetachable, which tire consists of an annular tube having a flat bottomadapted to sit upon the felly between the annular flanges, an annularjoint at one side of the bottom and an outside flange formed at the edgethereof,a dovetail bead formed upon the inside margin of the other sideof the tire at the joint adapted to enter the said groove and bearagainst the other flange of the tire when the detachable flange of thefelly is secured thereto substantially as and for the purpose hereindescribed.

2. The combination with a felly having an annular groove at one outercorner deeper at its inner than at its outer periphery, and annularflanges projecting above the felly, one of which is detachable, of atire made of india -rubber and canvas and of horseshoeshaped sectionwith a flat bottom formed in one pieee with one side of the tire, andeX- tending to the edge of said groove and having an outside flangeformed on it, the other side of the tire being separate from said flangeand formed with a dovetail enlargement upon its inside margin adapted t0enter said groove and bear against the flange of the tire-bottom whenthe detachable flange of the felly is secured thereto, means for holdingthe opposite side of the tire against the other flange and a valve forinflating the tire.

3. As an article of manufacturea pneumatic tire having arch-shaped sidesand tread, abottom adapted to fit a cylindrical felly formed at themargin of one side of the tire, an outside flange at the edge of thebottom, a dovetail enlargement formed at the margin of the other side ofthe tire and adapted to bear against said flange.

4. In a pneumatic tire the combination of arch-shaped sides 13, 19, andtread 16, a bottom 17 adapted to fit a cylindrical felly and connectedto the margin of one side 19 of the tire only, an outside flange 18formed onto the edge of the bottom, and a dovetail enlargement at themargin of the side 13 adapted to bear against the flange 18.

In testimony whereof I have hereunto set my hand in presence of twowitnesses.

EDWARD HENRY SEDDON.

Witnesses:

CARL BoLL, RIDLEY JAMES URQUHART.

IOO

